text{interior angle of a polygon} = \text{sum of interior angles} \div \text{number of sides}\) The sum of interior angles is \((6 - 2) \times 180 = 720^\circ\). One interior angle is \(720 \div 6 ...
Each polygon will always divide into two triangles fewer than the number of its sides. A hexagon will have four triangles. An octagon will have six triangles. So the sum of the interior angles of ...